Advocates of renewable energy in the United States point to its increasingly competitive cost in arguing against greater use of fossil fuels. Experts at a U.S. think tank have the same message for countries in the Mekong region, which are considering plans to expand hydropower dams and coal plants. New economic and technological opportunities for improving and diversifying the Mekong Region’s energy mix are laid out in a report by the Washington-based Stimson Center. Report co-author...